Designed Fabrication of Ordered Porous Au/Ag Nanostructured Films for Surface-Enhanced Raman Scattering Substrates

Lu, Lehui; Eychmüller, Alexander; Kobayashi, Atsuko; Hirano, Yoshiaki; Yoshida, Kenichi; Kikkawa, Yasuo; Tawa, Keiko; Ozaki, Yukihiro

doi:10.1021/la052659u

Cited by 88 publications

(85 citation statements)

References 42 publications

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“…Clearly, the AgNS/AuNP/NH2-cBN/Si(001) substrate showed higher stability than the silver film/cBN/Si(001) substrate prepared by the mirror reaction, which could be ascribed to the uniformity of the AgNS film and to the strong adhesion of the AgNS with the substrate. Moreover, compared with previous reports on other substrates, such as porous Au/Ag nanostructured-modified silica films, Au nanorod-modified indium-doped tin oxide films, and µAg powders/polymers, [25][26][27] the higher stability obtained in present AgNS/AuNP/ NH2-cBN/Si(001) can be mainly attributed to the extremely high physical and chemical stability of the cBN substrate. …”

Section: Detection Of Patp By the Sers Spectra On The Agns/aunp/nh2-csupporting

confidence: 39%

Surface-Enhanced Raman Scattering of 4-Aminothiophenol Adsorbed on Silver Nanosheets Deposited onto Cubic Boron Nitride Films

et al. 2010

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A simple method was found for the fabrication of silver nanosheets (AgNS) by the catalysis of gold nanoparticles (AuNP) on an amine-terminated cubic boron nitride (cBN) surface deposited on a Si(001) substrate in the presence of reductant. The morphology of the AgNS/AuNP/NH2-cBN/Si(001) sample was characterized by scanning electron microscopy and X-ray diffraction. The performance of the AgNS/AuNP/NH2-cBN/Si(001) sample as surface-enhanced Raman scattering (SERS) active substrate was evaluated by using 4-aminothiophenol (PATP) as the probe molecule. The SERS measurements showed that the maximum intensity was obtained on the AgNS/AuNP/NH2-cBN/Si(001) sample for 5 min silver deposition. Compared with the AuNP/NH2-cBN/Si(001) sample and a silver film/cBN/Si(001) prepared by the mirror reaction, the SERS signal of PATP was obviously improved on the above AgNS/AuNP/NH2-cBN/Si(001) film. The sensitivity and the stability of the AgNS/AuNP/NH2-cBN/Si(001) sample were also investigated.

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Section: Detection Of Patp By the Sers Spectra On The Agns/aunp/nh2-csupporting

confidence: 39%

Surface-Enhanced Raman Scattering of 4-Aminothiophenol Adsorbed on Silver Nanosheets Deposited onto Cubic Boron Nitride Films

et al. 2010

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“…[7,8] Macroporous materials have thus been exploited as exceptional substrates for surface-enhanced Raman scattering (SERS). [9][10][11][12][13] In the past decades, SERS has emerged as a new branch of the Raman technique, enabling the selective detection of various analytes at infinitesimal concentration and giving information on the structures and interactions or on the local environment at the molecular scale. The enhancement of the inherently weak Raman signal is due primarily to localized surface-plasmon resonance occurring at roughened or nanostructured noble metal surfaces.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of a Macroporous Microwell Array for Surface‐Enhanced Raman Scattering

Zamuner

Talaga

Deiss

et al. 2009

Adv Funct Materials

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Here, a colloidal templating procedure for generating high‐density arrays of gold macroporous microwells, which act as discrete sites for surface‐enhanced Raman scattering (SERS), is reported. Development of such a novel array with discrete macroporous sites requires multiple fabrication steps. First, selective wet‐chemical etching of the distal face of a coherent optical fiber bundle produces a microwell array. The microwells are then selectively filled with a macroporous structure by electroless template synthesis using self‐assembled nanospheres. The fabricated arrays are structured at both the micrometer and nanometer scale on etched imaging bundles. Confocal Raman microscopy is used to detect a benzenethiol monolayer adsorbed on the macroporous gold and to map the spatial distribution of the SERS signal. The Raman enhancement factor of the modified wells is investigated and an average enhancement factor of 4 × 104 is measured. This demonstrates that such nanostructured wells can enhance the local electromagnetic field and lead to a platform of ordered SERS‐active micrometer‐sized spots defined by the initial shape of the etched optical fibers. Since the fabrication steps keep the initial architecture of the optical fiber bundle, such ordered SERS‐active platforms fabricated onto an imaging waveguide open new applications in remote SERS imaging, plasmonic devices, and integrated electro‐optical sensor arrays.

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“…1,2 This ultrasensitive analytical method has been widely applied on the life and environmental science, 3,4 which inspire a worldwide effort to explore its mechanism both theoretically and experimentally. Various substrates with rough surface were developed for SERS study, such as metallic colloids, 5,6 electrochemically roughened electrodes, 7,8 chemically deposited metal films, 9,10 chemically etched metal nanostructures, 11 and so on. Among these substrates, colloidal gold (Au) and silver (Ag) nanoparticles (NPs) have been widely used because of their easy preparation and strong enhancement for the SERS detection.…”

Section: Introductionmentioning

confidence: 99%

Assembly of Gold Nanoparticles on Electrospun Polymer Nanofiber Film for SERS Applications

Wang¹,

Sun²,

Wang³

et al. 2014

Bulletin of the Korean Chemical Society

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We report a novel approach for fabricating active surface-enhanced Raman scattering (SERS) substrate for sensitive detection. This approach is based on the assembling of gold nanoparticles (AuNPs) onto the electrospun polycaprolactone (PCL) nanofiber film. The hydrophobic surface of PCL nanofiber film was pretreated using UV-inducing graft polymerization with acrylic acid. Afterwards this PCL nanofiber film was incubated with the AuNP solution to promote the assembly of AuNPs onto the PCL nanofibers and the formation of SERS active substrate. 4-aminothiophenol (4-ATP) molecule was used as a test probe for SERS experiments, indicating that the substrate has high sensitivity to SERS response. Our method has great advantage in term of environment-friendly synthesis, large-scale, high stability and good reproducibility. This highly active SERS substrate can be employed to detect the drug molecule, 2-thiouracil.

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Designed Fabrication of Ordered Porous Au/Ag Nanostructured Films for Surface-Enhanced Raman Scattering Substrates

Cited by 88 publications

References 42 publications

Surface-Enhanced Raman Scattering of 4-Aminothiophenol Adsorbed on Silver Nanosheets Deposited onto Cubic Boron Nitride Films

Surface-Enhanced Raman Scattering of 4-Aminothiophenol Adsorbed on Silver Nanosheets Deposited onto Cubic Boron Nitride Films

Fabrication of a Macroporous Microwell Array for Surface‐Enhanced Raman Scattering

Assembly of Gold Nanoparticles on Electrospun Polymer Nanofiber Film for SERS Applications

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